keep awake cloud functions

functions/package.json

@@ -13,6 +13,7 @@
   },
   "main": "lib/index.js",
   "dependencies": {
+    "fetch": "1.1.0",
     "firebase-admin": "10.0.0",
     "firebase-functions": "3.16.0",
     "lodash": "4.17.21"

functions/src/call-cloud-function.ts

@@ -0,0 +1,17 @@
+import * as admin from 'firebase-admin'
+
+import fetch from './fetch'
+
+export const callCloudFunction = (functionName: string, data: {} = {}) => {
+  const projectId = admin.instanceId().app.options.projectId
+
+  let url = `https://us-central1-${projectId}.cloudfunctions.net/${functionName}`
+
+  return fetch(url, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ data }),
+  }).then((response) => response.json())
+}

functions/src/fetch.ts

@@ -0,0 +1,9 @@
+let fetchRequest: typeof fetch
+
+try {
+  fetchRequest = fetch
+} catch {
+  fetchRequest = require('node-fetch')
+}
+
+export default fetchRequest

functions/src/index.ts

@@ -2,5 +2,6 @@ import * as admin from 'firebase-admin'
 
 admin.initializeApp()
 
+export * from './keep-awake'
 export * from './place-bet'
-export * from './resolve-market'
+export * from './resolve-market'

functions/src/keep-awake.ts

@@ -0,0 +1,12 @@
+import * as functions from 'firebase-functions'
+
+import { callCloudFunction } from './call-cloud-function'
+
+export const keepAwake = functions.pubsub
+  .schedule('every 1 minutes')
+  .onRun(async () => {
+    await Promise.all([
+      callCloudFunction('placeBet'),
+      callCloudFunction('resolveMarket'),
+    ])
+  })